According to the latest Us mag, Scarlett Johansson had been lying in wait for Justin Timberlake’s troubled relationship with Cameron Diaz to be over so she could move in for the kill. When she accepted Timberlake’s offer to be in his “What Goes Around” video, she set the split in motion, and landed him. “Scarlett has always liked Justin,” says a friend of Johansson’s. “They’ve always had a flirtation – that’s why Cameron was threatened by her.” A friend of Timberlake’s says, “[Cameron] could not believe he went behind her back to put her in the video. Cameron was very jealous of Scarlett.” Diaz got her revenge of sorts last night at the People’s Choice Awards when she won Favorite Leading Lady over Johansson and Kirsten Dunst.